public void Build_DisplayNameIsNameWithDots_NameComparisonPrefixMatch() { // Arrange var tagHelperBuilder = new DefaultTagHelperDescriptorBuilder(TagHelperConventions.DefaultKind, "TestTagHelper", "Test"); var tagMatchingRuleBuilder = new DefaultTagMatchingRuleDescriptorBuilder(tagHelperBuilder); var builder = new DefaultRequiredAttributeDescriptorBuilder(tagMatchingRuleBuilder); builder .Name("asp-route-") .NameComparisonMode(RequiredAttributeDescriptor.NameComparisonMode.PrefixMatch); // Act var descriptor = builder.Build(); // Assert Assert.Equal("asp-route-...", descriptor.DisplayName); }